Edge-finishing machine



H. E. ENS'LINI EDGE FINISHING MACHINE.

APPLICATION FILED JUNE 20. I917. 1,331,056. Patented Feb. 17,1920.

3 SHEETS'SHEEI I.

H. E. ENSLIN.

EDGE FINISHING MACHINE.

APPLICATION FILED JUNE 20, 1917 Patented Feb. 17, 1920.

3 SHEETSSHEEI 2- H. E. ENSLIN.

EDGE FINISHING MACHINE. APPLICATION FILED JUNE 20, I91].

Patented Feb. 17,1920.

3 SHEETS-SHEET 3.

' Iu-mw'i': 95 91 101 99 I'IIIIIIIIWIZIIIIII 89 lam-mm IIIIiiIIIIII q UNITED STATES PATENT OFFICE.

HERBERT E. ENSLIN, OF MALDEN, MASSACHUSETTS, ASSIGNOR, BY .lVlI'ESNlZl ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

A. CORPORATION 9F NEW JERSEY.

EDGE-FINISHING MACHINE.

Specification of Letters Patent.

Patented Feb. 17, 1920.

Application filed June 20, 1917. Serial No. 175,965.

To all whom it may concern:

Be it known that I, HERBERT E. ENsLIN, a citizen of the United States, residing at Malden, in the county. of Middlesex and State of Massachusetts, have invented certain Improvements in Edge-Finishing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference charactors on the drawings indicating like parts in the several figures.

This invention relates to machines for finishing the edges of leather and is illustrated as embodied in a machine of the type shown in Patent No. 1,203,993, granted to me on November 7, 1916.

In machines of this class one side of the margin of a piece of leather is subjected to heat thereby shrinking that side and causing the other side of the margin to curl toward the shrunken side. A thick piece'of leather requires more heat than a thin piece of the same quality, and hitherto it has been customary to control the application of heat by manual manipulation of some member, the degree of heat thus predetermined remaining the same until a further manipulation was made.

One feature of the present invention comprises, in a machine of the class described, means for applying heat to a piece of work, and automatic means for controlling the degree of heat applied. In the illustrative machine the work is fed past a hot tool which rests upon its surface near the edge, the tool being heated by an electric current the strength of which is controlled by a rheostat; and connections are provided between the tool and the rheostat such that the height of the tool above the work support determines the position of the short circuit plate of the rheostat and thereby controls the degree of heat supplied to the tool. The construction and arrangement of parts is such that no current passes through the tool except while a piece of work is being presented to or fed through the machine; and this is of great advantage since the tool thereby has a much longer life than would be the case were the tool maintained steadily at the high temperature necessary for properly treating the work.

The efiect of a given amount of heat upon the work depends upon the duration of the application of the heat. With a, predetermined degree of heat it is desirable that the application to a thick piece of work should be more prolonged than toa thin piece.

Another feature of the invention comprises, in a machine of the class described, a support for the work,a' tool for operating upon the work, and means dependent upon a characteristic of the work for controlling the duration of operation of the tool. In the illustrative machine a variable speed transmission mechanism is interposed in the mechanism which drives the feeding members, and the regulation of this variable speed mechanism is controlled by the raising and lowering of the tool, that is, by the thickness of the work. The construction and arrangement is such that when a thin piece of work is presented to the machine and the tool is therefore comparatively close to the work support the rate of feed of the work is increased, and when thick piece is presented to the machine and the tool is therefore held farther above the work support the rate of feed is decreased.

Another feature of the invention comprises, in a machine of the class described, a support for a piece of work, a tool for operating upon the work, normally inoperative mechanism for registering the linear extent of the work passed through the machine, and means held in position by the work while it is passing through the machaine for causing the registering mechanism to operate. In the illustrative machine, as has been explained, the tool is held above the work support by the work upon which it is operating. 'The registering mechanism is normally inoperative but may be rendered operative by throwing in a clutch; and this clutch is connected with the tool in such a manner that when the tool is held in raised position by a piece of work the clutch is thrown in, and as soon as the work passes from beneath the tool the clutch is thrown out. With this construction there is automatically secured a record of the linear extent of all. the work which passes throu 'h the machine.

Hitherto-1t has not been practicable to use an edge gage to facilitate presentation to the tool of certain pieces of work having reentrant curves such as full length Vamps owing to the fact that the gage lies in the path of the vamp when the throat is reached. Accordingly another feature of the invention comprises an edge gage for facilitating presentation of the work to the tool, and means for moving the gage to inoperative position when the presentation is accomplished.

These and other features of the invention, including certain details of construction and combinations of parts, will be described in connection with an illustrative machine and pointed out in the appended claims.

Referring now to the accompanying drawings,

Figure l is a side elevation, partly in section, of a machine in which the present invention is embodied;

Fig. 2 is a detail in section of part of the mechanism for controlling the degree of heat of the tool;

Fig. 3 is a perspective of the mechanisms for controlling the degree of heat of the tool and for controlling the rate of feed of the work; 7

Fig. 4 is a perspective of the oiling mechanism; 0

Fig. 5 is a perspective of the plate through which the grooved molding wheel projects and of the ends of the grippers which seize the forward edge, of the work and draw it beneath the hot tool;

Fig. 6 is a perspective of the mechanism for CODtIOlliIlg the operation of the disappearing edge gage;

Fig. 7 is a. perspective of the disappearing edge gage;

Fig. 8 is a plan of the mechanism for measuring and recording the length of the pieces of work, and

Fig. 9 is a diagram of the wiring.

As has been stated above, the present ma chine is an improvement upon the machine of Patent No. 1,203,993; and before describing the improvements in detail a brief description will be given of those parts of the two machines which are identical or substantially so.

Referring more particularly to Fig. 1, the work is fed beneath an electrically heated tool 9 by means of a turntable 11 and an upper feed wheel 13 the axis 'of which is slightly inclined. The feed wheel 13 acts not only to feed the work but to crowd the edge of the work while it is still hot and plastic into a groove in a molding wheel 15. In order to permit introduction of the work beneath the tool said tool is carried by a head 1? which may be raised by manipulating a lever 19 pivoted to the frame of the machine at 21; and. in order to insure that the 6X treme forward edge of the work shall be opcrated upon by the tool, a pair of grippers autrmatically move under the wheel when the head is raised, grip the forward edge and draw the work along beneath the tool until its forward edge is engaged by the feed wheel 13. The ends of these grippers are indicated at 23 in Fig. The head 17 is substantially identical with the one shown and described in the patented machine and is capable of the same adjustments. The mechanism for driving the turn-table, the molding wheel and the feed wheel is also similar to that shown in the patent, and no further description of these parts of the machine will be given. It will be understood, how ever,that the margin of the work on one side is shrunk by the action of the hot tool so as to cause the otherside to curl toward the shrunken side, and that the crowding of the hot and plastic edge of the leather into the groove of the molding wheel 15 imparts to the edge the desired shape.

It has been found that in machines of this class it is desirable that the degree of heat of the tool and the rate of feed of the work should be varied in accordance with the thickness of the work. With a thin piece of work a lower degree of heat and a faster rate of feed is desirable while with a thicker piece of wor r the opposite is true. Referring now more particularly to Figs. 1, 3 and 9, the mechanism for controlling the degree of heat of the tool'and the rate of feed of the work will be described. The tool is heated by electricity which passes through a transformer as indicated in Fig. 9 and then through the tool, the wires which lead to the tool being indicated at 25 and 27. Between the wires 25 and 27 is a rheostat of which the short circuit plate is indicated at 29 and the contact points at 31. The plate has an inclined lower edge so that by moving it down the resistance units are cut out one by one to increase the current which passes through the tool. In other words, downward movement of the plate 29 raises the heat of the tool and upward movement lowers it. Referring now to Figs. 1 and 3, the plate 29 has fast to it a bar 95 which is pivoted at th outer end of an arm 33 the inner end of which is pivoted at 35 to the frame of the machine. Between the ends of the arm 33 is pivoted a link 37 to the lower end'of which is pivoted an arm 20 fast to the lever 19 movement of which, as has been explained, raises and lowers the head of the machine and with it the tool 9. It will now be evident that when that end of the lever 19 which is remote from the head 1? is pulled down, the plate 29 will be moved down to cut out the resistance more or less and thereby to raise the temperature of the tool, and that when the lever 19 is released and the tool comes into a position which is determined by the thickness of the'work beneath the tool, the current which is flowing through the tool depends upon the thickness of the work.

Turning now to the mechanism for controlling the rate of feed of the work, there is mounted upon the drive shaft 39 a cone 41 and upon the counter shaft 43 a reversely positioned cone 45 while between the two cones runs a loose band 47 upon the position of which depends the rate of rotation of the counter shaft 43. With the parts in the posit-ion shown the rate of rotation of the counter shaft 43 is substantially a'maximum while if the band 47 were moved to the other ends of the cones the rate would be substantially a minimum. In order to cause this band to be shifted when the lever 19 is manipulated, a link 49 pivoted at its upper end to the arm 33 is connected at its lower end by a pin and slot with a bell crank lever 51. The free end of this bell crank lever embraces a rod 53 which is slidable in the frame of the machine and has at one end a guide pulley 55 for the shiftable band 47, the yoke on the bell crank lever being located between adjustable collars 57 In order to hold the band 47 normally in the position shown, a spring 59 bears at one end against one of the collars 57 and at the other end against the frame of the machine. The purpose of the pin and slot connection between the link 49 and the bell-crank lever 51 is to permit a considerable amount of movement of the link. In the illustrative machine, when the pin has been moved half-way down in the slot, the band 47 has been shifted to the opposite end of the cone pulleys 41, 45 from that shown and further downward movement of the pin has no effect on the band, the rod 53 being at that time held from further movement to the left by a stop 54. This whole construction permits raising of the head 17 of the machine sufliciently to allow the operatorto present the work properly to the grippers It will be clear that when the lever 19 is manipulated to raise thehead 17 and the plate 29 is moved downwardly to increase the heat, the band 47 is moved to decrease the rate of rotation of the shaft 43 and consequently the rate of rotation of the feed wheel 13, the turn-table 11 and the molding wheel 15, these parts of the machine being connected with the counter shaft 43 by gears, worms and shafts as shown. After the lever 19 has been released and the tool has descended upon the work, its vertical position will depend upon the thickness of the work; and upon this vertical position, as has been explained above, depends the position of the band 47 and consequently the rate of feed of the work, that is, the thinner the work is the faster the rate of feed. The end of the lever 19 which is remote from the head 17 is pivoted to a link 61 the lower end of which is pivoted to an arm 63 on a rock shaft 65, said ro'ck shaft carrying at its other end an arm 67 to which the treadle rod 69 is pivoted. In order to hold the parts normally in the position shown with the contact plate 29 raised a spring 71 is connected at its lower end to said plate and at its upper end to a screw 73 which may be raised and lowered by turning a thumb nut 75.

The movement of the lever 19 serves not only to control the heat and the rate of feed in the manner which has been described, but also to throw into and out of operation an indicator which registers and accumulates the length measurements of the pieces of work which pass through the machine. This registering mechanism (see Fig. 8) comprises the usual numbering wheels 77 which are arranged to be turned in proper sequence when the two clutch members 79 and 81 are engaged. The details of the registering mechanism form no part of the present invention and will not be described. The spring 83 tends at all times to hold the clutch members 79 and 81 in engagement, and an arm 85 fast to an upright rock shaft 87 (see Fig. 3) acts when in the position shown to hold the clutch members apart against the tension of'the spring. It will be understood that the gear 89 upon which the clutch member 79 is formed is rotated continuously by means of a worm 91 carried by the upright shaft 98. While there is no work in the machine, the clutch members 79 and 81 are held separated as shown by means of the bar 95. This bar is provided with a groove 97 of such length and so located that whenever the tool is operating upon a piece of work a roller 99 on the end of an arm 101 is located in said groove. This arm 101 is fast to the upper end of the rock shaft 87 to the lower end of which the arm 85 is fastened. The registering mechanism is thus normally inoperative. WVhen the lever 19 is manipulated to raise the head of the machine the bar 95 descends until the roller 99 has traversed the whole of the groove 97 and has ridden up out of its upper end. When the lever 19 is released to permit the tool to descend upon the work the bar 95 rises until the roll 99 rests somewhere in the groove 97. During the raising of the head 17 there is thus an interval in which the registering mechanism is theoretically operative; but this interval is so short that it is entirely negligible.

in presenting the work to the machine the proper location of the edge of the work with respect to the hot tool and the grooved molding wheel is very important. An edge gage is desirable to facilitate this presentation, but a fixed edge gage would interfere with the proper feeding through the machine of various pieces of work. For example, in performing the edge finishing operation upon a long vamp, it would be difficult to turn the vamp properly when the throat was reached if an edge gage were projecting above the surface of the table. In order to provide for this and similar conditions, the edge gage mechanism shown in detail in Figs. 6 and 7 has been provided. The edge gage 105 is formed on the upper end of a rod 107 which is slidable through a sleeve 109 threaded into a part of the fran're of the machine, a spring 111 between the sleeve and a collar 113 on the rod serving to hold the edge gage normally in raised position. The lower end of the rod 107 is fast to a block 115 which is loosely connected by a small rod 103 to a second bl ck 117. A second rod 119 which is fast at its lower end to the block 11% passes up through the hollow spindle of the molding wheel 15. If there were nothing to preventit the ends of the rods-10? and 119 would project respectively above the table of the machine and above the surface of the mold ing wheel 15. The upper end of the rod 119, however, is adapted to be caused to contact when desired with a sleeve 120 slioable on the shaft of the feed wheel 13. This sleeve has a conical end which will ride easily over the upper end of the rod 119 and is provided with projecting lug to which a slide rod 122 is fast. The parts of the edge mechanisa are so constructed and arranged that, when the slide rod 122 is pushed in so as to bring the part of largest dian'ieter of the sleeve 120 over the end of the rod 119, the edge gage 105 disappears be ieath the surface of the work table when the head lowered; and when the rod 122 pulled out the edge remains at all times ahove the surface of the table. l Vhen, therefore, the rod 122 is in its innermost position and the head 17 is in its lowered position, the edge gage 105 is flush with or beneath the surface of the table but as soon as the lever 19 is manipulated to raise the head, the edge gage 105 is immediately raised into operative position and remains in this position while the opera tor presents the work to tl e machine. As soon as the work has been properly presented so as to be seized by the grippers 23 the head is lowered and the work fed to the machine, the edge gage 105 disappearing with the lowering of the head. It is thus possible to provide means for properly presenting work having curved edges to the machine which shall not in any way interfere with the subsequent feedin' of the work.

In the operation of machines of this class in which a vcrv hot tool is applied to leather, here exudes from the lcat ier in considerable quantity a iscous or gummy substance which is liable to interfere seriously with the proper feeding of the leather. This gummy substance causes particular difliculty liy collecting upon. the top of the turn-table 11 and upon the edge of the molding wheel 15. In order to counteract the sheet of this substance and to facilitate the feeding of the work, mechanism is provided for applying to the turn-table and the molding wheel a sn'iall amount of oil. To this end the work plate of the machine is provided with two countersunk slots 121 to receive two slides 123, 125 which are rigidly connected by a bar 127. The slide 123 carries a flat linger 128 to the under side of which oil is supplied from awick in a small U-shaped tube 129 (see Fig. 1) located beneath the work plate. Oil is supplied to the edge of the molding wheel by means of a wick 131 fastened to the inner end of the slide 125 and extending down into the oil tube 129. The frame coinposcd of the slides 123, 125 and bar 127 is reciprocated by means of a barrel cam 133 (see Fig. 1) formed in the hub of the gear 135 with which cooperates a roll 137 carried the lower end of the slide 123. As the gear 135 is turned the frame reciprocates so as to cause the linger 128 to apply a slight amount of oil to the surface of the turn-table 11 and the wick 131 to apply a slight amount of oil to the edge of the molding wheel 15.

The operation of the machine is as follows:

The treadle (not shown) is depressed thereby pulling down the right-hand end of the lever 19 as viewed in Fig. 1. This raises the head '17 and with it the tool 9 and opens and moves toward the operator and at one side of the tool the grippers 23. The work is then presented to the open grippers with its edge against the gage 105, and the head allowed to descend. The grippers close upon and draw the work along until it is caught by the feed wheel 13 whereupon they release it, and the work is thereafter fed by said wheel and the turn-table 11. According to the position of the rod 122, the edge gage 105 either remains in operative position or disappears beneath the work table. Referring now to Figs. 3, 8 and 9, when the head is raised to permit presentation of the work the arm 33 is swung downwardly. The effect of this-is to cause the roll 99 to traverse very quickly the groove 97 and to ride up the higher side of said groove, to cause the full current to pass through the tool, and to shift the band 17 to the position of minimum feed. As soon as the head is lowered the roll 99 drops into the groove 97 whereupon the registering mechanism begins to operate, the plate 29 is raised and the band 17 shifted, each a distance dependent upon the thickness of the work. This condition obtains until the work passes from beneath the tool whereupon the parts re turn to the position shown in Fig. 1 in which the registering mechanism is inoperative, no current is passing through the tool and the feed is at a maximum.

Although the invention has been set forth in connection with a machine in which a climension of the work automatically controls the operation of the heat supplying and other mechanisms, it should be understood that the invention is not limited in the scope of its application to control by the work or by this particular characteristic of the work. I

Having thus described my invention, what I claim as new and desire to secure by Letters Patentof the United States is:

1. A machine of the class described, having, in combination, means for applying heat to a piece of work, and means depend ent upon the thickness of the work for controlling the amount of heat applied.

2. A machine of the class described, having, in combination, means for applying heat to a piece of work, and means operated by the work for controlling the amount of heat applied.

3. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for heating the tool, and means dependent upon the thickness of the work for controlling the amount of heat supplied to the tool.

at. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for heating the tool, and means operated by the work as it passes through the machine for controlling the amount of heat supplied to the tool.

5. A machine for applying heat to the margin of a piece of work, having, in combination, a support for the work, and a member arranged to engage the upper side of the .work and adapted by its position to control the amount of heat applied.

6. A machine for finishing the edge of a piece of flexible material, having, in combination, a support for the material, a shrinking tool for operating upon the mar gin thereof, means for causing the tool to be applied to the margin, and means'responsive to the thickness of the material for varying the action of the tool.

7. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, said tool and support being separable to per mit work of different thickness to be operated upon, means for supplying heat to the tool, and means dependent upon the extent of said separation for controlling the amount of heat supplied.

S. A machine of the class described, hav ing, in combination, a support for a piece of work, a tool for operating upon the work, said tool and support being separable to permit work of different thickness to be operated upon, means for conducting a current of electricity through the tool to heat it, and means dependent upon the extent of said separation for controlling the strength of the current.

9. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for producing relative movement be tween the support and tool to cause the work to be traversed by the tool, means for supplying heat to the tool, and means dependent upon the thickness of the work for controlling the amount of heat supplied. 10. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for producing relative movement between the support and tool to cause the work to be traversed by the tool, means for supplying heat to the tool, and automatic means dependent upon the thickness of the work for controlling the amount of heat supplied. 11. A machine of the class described, hav- 111g, in combination, a support for a piece of work, a tool for operating upon the work, means for feeding the work past the tool, means for supplying heat to the tool, and means dependent upon the thickness of the work for controlling the amount of heat supplied. 12. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for feeding the work past the tool, means including an electrical circuit for heating the tool, and means dependent upon the thickness of the work for controlling the strength of the current flowing through the circuit.

13. A machine for finishing the edge of a piece of flexible material, having, in combination, a support for the material, an electrically heated tool, means for feeding the material past the tool to cause one side of the margin of the material to be shrunk, and means dependent upon the thickness of the material for controlling the temperature of the tool.

14. A machine of the class described, having, in combination, a support for the work,

a tool for operating upon the Work, means for producing relative movement between the tool and the support to cause the work to be traversed by the tool, and means dependent upon the thickness of the work for controlling the rate of said movement.

15. A machine of the class described, hav

ing, in combination, a support for the work, a tool for operating upon the work, means for feeding the work past the tool, and means dependent upon the thickness of the work for controlling the rate of feed.

16. A machine of the class described, having, in combination, a support for the work, a tool for operating upon the work. means for feeding the Work past the tool, and auto matic means dependent upon the thickness of the work for feeding a thin piece of work faster than a thick piece.

17. A machine for finishing the edge of a piece of flexible material, having, in combination, a support for a piece of flexible material, a heated tool, means for feeding the material past the tool to cause one side of the margin thereof to be shrunk, and means dependent upon the thickness of the work for controlling the rate of feed.

18. A machine for finishing the edge of a piece of flexible material, having, in combination, a support for a piece of flexible material, a heated tool, means for feeding the material past the tool to cause one side of the margin thereof to be shrunk, and means dependent upon the thickness of the work for decreasing the rate of feed as the thickness of the work increases.

19, A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, a head by which the tool is carried, means for raising the head to permit the work to be placed beneath the tool, means including a variable speed transmission mechanism for feeding the work, and means dependent upon the position of the head for control ling said mechanism.

20. A machine of the class described, having, in combination, ,a support for a piece of work, a tool for operating upon the Work, normally inoperative mechanism for registering the linear extent of the work passed through the machine, and means held in position by the Work while it is passing through the machine for causing the registering mechanism to operate.

21. A machine for finishing the edge of a piece of flexible material, having, in combination, a support for the material, a shrinking tool for operating upon the margin of the material, means for feeding the material over the support and beneath the tool, normally inoperative mechanism for register-- ing the linear extent of the material fed through the machine, and means held in position by the material while it is in contact with the material for causing the registering mechanism to operate.

22. A machine of the class described, having, in combination, a support for a piece of work, a head movable toward and from the support, a tool carried by said head, means for feeding the work, normally inoperative mechanism for registering the linear extent of the work fed through the machine, and means actuated by movement of the head away from the support for rendering said mechanism operative.

:28. A machine of the class described, having, in combination, a heated shrinking tool, means for feeding a piece of leather past the tool with its margin in contact therewith, and means operated by the work as it passes through the machine and dependent upon the thickness thereof for controlling the rate of the feed and the temperature of the tool.

2%. A machine of the class described, having, in combination, shrinking means, mechanism for causing the shr nking means to act upon the margin of a piece of material, and means responsive to the thickness of the material for simultaneously varying the length of time that the shrinking means acts upon a given portion of material and for varying the intensity of action of the shrinking means.

25. A machine of the class described, having, in combination, means for applying heat to a piece of work, means for feeding the work, and means dependent upon the thickness of the work for simultaneously controlling the amount of heat applied and the rate of feed.

26. A machine of the class described, having, in combination, means for applying heat to a piece of work, means for feedin the work, and means dependent upon the thick; ness of the work for sinmltaneously increasing the heat and decreasing the rate of feed as the work increases in thickness.

27. A machine of the class described, having, in combination, a tool for operating upon the work, an edge gage for facilitating presentation of the work to the tool, said gage being movable from operative to inoperative position, and means dependent upon the position of the tool for controlling the position of the gage.

28. A machine of the class described, having, in combination, a work support, a tool for operating upon the work, said tool being capable of being raised to permit presentation. of the work beneath it and of being lowered upon the work, an edge gage to facilitate the presentation, and means for causing the gage to move below the plane of the support when the tool is lowered.

29. A machine of the class described, having, in combination, tool for operating upon the work, said tool being normally in operative position and being movable to inoperative position to permit presentation of the work in position to be operated upon by the tool, an edge gage normally in inoperative position, and means for moving the edge gage to operative position when the tool is moved to inoperative position and for moving the gage to inoperative position when the tool is moved to operative position.

30. A machine of the class described, having, in combination, a support for the work, means for feeding the work along the support, means for operating upon the work, an edge gage normally extending above the support into operative position, and means connected with the operating means for moving the gage to inoperative position.

31. A machine of the class described, having, in combination, a support for the work, means for feeding the work along the support, a tool for operating upon the work, said tool and support being separable to permit presentation of the work to the tool, an edge gage normally below the surface of the support, and means for raising said gage when said tool and support are separated.

32. A machine for finishing the edge of a piece of work, having, in combination, a heated tool, a molding wheel, means for feeding the work past the tool and wheel, and means for supplying lubricant to the operative surface of the wheel.

33. A machine for finishing the edge of a piece of leather, having, in combination, a heated tool, a molding wheel, means for feeding the leather past the tool and wheel, and means for supplying lubricant to the operative surface of the wheel and feeding means.

34. A machine for finishing the edge of a piece of leather, having, in combination, a heated tool, a molding wheel, means including a turn-table for feeding the leather past the tool and wheel, and means for supplying lubricant to those faces of the wheel and turn-table which contact with the leather.

35. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for supplying heat to the tool, means for feeding the work over the support and beneath the tool, and means controlledby the passing of the work from operative relation with respect to the tool for stopping-the supply of heat.

36. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means for supplying heat to the tool, and automatic means for controlling the amount of heat supplied.

37. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work, means fol-supplying heat to the tool, and means responsive to a characteristic of the work for varying the amount of heat supplied.

38. A machine of the class described, having, in combination, a support for a piece of work, a tool for operating upon the work,

piece of work, a support for the work, a

member arranged to contact with the work, said member and support being separable, and means responsive to the extent of the separation for controlling the amount of heat applied.

40. A machine of the class described, having, in combination, a heated tool, means for causing the tool to act upon a piece of material, and automatic means for varying both the length of time that the tool acts upon the material and for varying the intensity of action of the tool.

41. A machine of the class described, having, in combination, a tool for operating upon the work, an edge gage for facilitating presentation of the work to the tool, and automatic means for moving the gage to inoperative position when the presentation is accomplished.

42. A machine of the class described, having, in combination, a tool for operating upon a piece of work, means for feeding the work past the tool, an edge gage for facilitating presentation of the work to the tool, said gage being in the path of feed movement of a portion of the work, and automatic means for moving the gage out of said path of movement.

43. A machine of the class described, having, in combination, a support for a piece of work, a, tool for operating upon the work, means for supplying heat to the tool, means for registering the linear extent of the work operated upon by the tool, and a member operated by the work for controlling the operation of the registering mechanism'and that of the heat supplying mechanism.

44. A machine of the class described, having, in combination, a support for the work, a tool, means for holding the tool in contact with the work,.and means dependent upon a characteristic of the work for controlling the duration of the contact of the tool with the work.

In testimony whereof I have signed my name to this specification.

HERBERT E. ENSLIN. 

